import {
  document,
	window,
	HTMLCanvasElement,
	requestAnimationFrame,
	cancelAnimationFrame,
core,
	Event,
  Event0
} from "dhtml-weixin"
import * as THREE from './three/Three';

import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { OrbitControls0 } from 'three/addons/controls/OrbitControls0.js';
import { GroundProjectedSkybox } from 'three/addons/objects/GroundProjectedSkybox.js';
import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
import { DRACOLoader } from 'three/addons/loaders/DRACOLoader.js';
import { RGBELoader } from 'three/addons/loaders/RGBELoader.js';
var requestId
Page({
  onShareAppMessage(){
    return getApp().onShare()
  },
  onShareTimeline(){
     return {title:"ThreeX 2.0"}
  },
	onUnload() {
		cancelAnimationFrame(requestId, this.canvas)
		this.worker && this.worker.terminate()
if(this.canvas) this.canvas = null
		setTimeout(() => {
			if (this.renderer instanceof THREE.WebGLRenderer) {
				this.renderer.dispose()
				this.renderer.forceContextLoss()
				this.renderer.context = null
				this.renderer.domElement = null
				this.renderer = null
			}
		}, 0)
	},
  webgl_touch(e){
		const web_e = (window.platform=="devtools"?Event:Event0).fix(e)
		this.canvas.dispatchEvent(web_e)
  },
  onLoad() {
		document.createElementAsync("canvas", "webgl2").then(canvas => {
      this.canvas = canvas
      this.body_load(canvas).then()
    })
  },
  async body_load(canvas3d) {

  const params = {
    height: 20,
    radius: 440
  };

  let camera, scene, renderer, skybox;

  init().then( render );

  async function init() {

    camera = new THREE.PerspectiveCamera(
      40,
      window.innerWidth / window.innerHeight,
      1,
      1000
    );
    camera.position.set( - 20, 7, 20 );
    camera.lookAt( 0, 4, 0 );

    scene = new THREE.Scene();

    const hdrLoader = new RGBELoader();
    const envMap = await hdrLoader.loadAsync( 'textures/equirectangular/blouberg_sunrise_2_1k.hdr' );
    envMap.mapping = THREE.EquirectangularReflectionMapping;

    skybox = new GroundProjectedSkybox( envMap );
    skybox.scale.setScalar( 100 );
    scene.add( skybox );

    scene.environment = envMap;

    const dracoLoader = new DRACOLoader();
    dracoLoader.setDecoderPath( 'jsm/libs/draco/gltf/' );

    const loader = new GLTFLoader();
    loader.setDRACOLoader( dracoLoader );

    const shadow = new THREE.TextureLoader().load( 'models/gltf/ferrari_ao.png' );

    loader.load( 'models/gltf/ferrari.glb', function ( gltf ) {

      const bodyMaterial = new THREE.MeshPhysicalMaterial( {
        color: 0x000000, metalness: 1.0, roughness: 0.8,
        clearcoat: 1.0, clearcoatRoughness: 0.2
      } );

      const detailsMaterial = new THREE.MeshStandardMaterial( {
        color: 0xffffff, metalness: 1.0, roughness: 0.5
      } );

      const glassMaterial = new THREE.MeshPhysicalMaterial( {
        color: 0xffffff, metalness: 0.25, roughness: 0, transmission: 1.0
      } );

      const carModel = gltf.scene.children[ 0 ];
      carModel.scale.multiplyScalar( 4 );
      carModel.rotation.y = Math.PI;

      carModel.getObjectByName( 'body' ).material = bodyMaterial;

      carModel.getObjectByName( 'rim_fl' ).material = detailsMaterial;
      carModel.getObjectByName( 'rim_fr' ).material = detailsMaterial;
      carModel.getObjectByName( 'rim_rr' ).material = detailsMaterial;
      carModel.getObjectByName( 'rim_rl' ).material = detailsMaterial;
      carModel.getObjectByName( 'trim' ).material = detailsMaterial;

      carModel.getObjectByName( 'glass' ).material = glassMaterial;

      // shadow
      const mesh = new THREE.Mesh(
        new THREE.PlaneGeometry( 0.655 * 4, 1.3 * 4 ),
        new THREE.MeshBasicMaterial( {
          map: shadow, blending: THREE.MultiplyBlending, toneMapped: false, transparent: true
        } )
      );
      mesh.rotation.x = - Math.PI / 2;
      mesh.renderOrder = 2;
      carModel.add( mesh );

      scene.add( carModel );

      render();

    } );

    //

    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setPixelRatio( window.devicePixelRatio );
    renderer.setSize( window.innerWidth, window.innerHeight );
    renderer.toneMapping = THREE.ACESFilmicToneMapping;

    //

    const controls = new (window.platform=="devtools"?OrbitControls:OrbitControls0)( camera, renderer.domElement );
    controls.addEventListener( 'change', render );
    controls.target.set( 0, 2, 0 );
    controls.maxPolarAngle = THREE.MathUtils.degToRad( 90 );
    controls.maxDistance = 80;
    controls.minDistance = 20;
    controls.enablePan = false;
    controls.update();

    const gui = new GUI();
    gui.add( params, 'height', 20, 50, 0.1 ).name( 'Skybox height' ).onChange( render );
    gui.add( params, 'radius', 200, 600, 0.1 ).name( 'Skybox radius' ).onChange( render );

    //

    document.body.appendChild( renderer.domElement );
    window.addEventListener( 'resize', onWindowResize );

  }

  function onWindowResize() {

    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();

    renderer.setSize( window.innerWidth, window.innerHeight );

    render();

  }

  function render() {

    renderer.render( scene, camera );

    skybox.radius = params.radius;
    skybox.height = params.height;

  }
  }
})